Skip to content

What Is Induction and Why Should Scientists Use It

November 18, 2010

Induction is typically defined as a method or a “kind of reasoning that draws generalized conclusions from a finite collection of specific observations.” For scientists, philosophers and students, it is important to understand the concept and practical use of induction in order to support progress and make progress possible.

Here I’m going to post an interview with Dr. David Harriman, a physicist and Objectivist, about his monumental book titled The Logical Leap: Induction in Physics.

The Logical Leap: Q&A with Author David Harriman

Q: In a nutshell, what is induction?

Induction is the process of inferring generalizations from particular instances. Consider an advanced, scientific example: Newton began with observations of particular planets, moons, apples, tides, and comets—and he generalized to arrive at the universal law of gravitation.

Typically, philosophers have been skeptical about this process. The so-called “problem of induction” is usually stated this way: How can we be justified in making a giant “leap” from a relatively few observations to a universal truth?

Q: Is there a “problem of induction”—and if so, how do you attempt to solve it?

I argue in my book that there is no problem of justifying an arbitrary leap—because there is no arbitrary leap. The inference of generalizations from particulars is a perfectly logical process. The problem is not to justify it, but to identify the method of doing it properly.

As the means to that end, I discuss topics ranging from the nature of concepts to the role of experiment and mathematics to the criteria of proof for a theory. My approach is to look closely at the discovery processes of great scientists, and thereby induce the correct principles of method. The result is a theory of induction containing many new points that I hope philosophers, scientists, teachers and students will find interesting.

Q: Do you think that scientists today are following the inductive method you advocate, or are they doing something different?

If they are making valid discoveries, then they are doing so in the way I describe. The theme of my book is not merely that scientists should use this method; rather, I make the stronger claim that they must use this method in order to make progress. And many scientists are making progress, particularly in the applied fields.

In physics today, the main problem is in fundamental theory. For example, many physicists accept string theory because they find it “beautiful,” not because it is induced from observational evidence. As a result, progress in theoretical physics has stagnated for more than a generation.

Q: How did you become interested in the topic of scientific induction?

All of our conceptual knowledge depends on induction, and philosophers since antiquity have struggled with the question of how we can be certain of our inductive generalizations.

Four centuries ago, modern science was born. Since that time, scientists have been enormously successful in their efforts to induce the laws of nature. But philosophers have been unable to explain how and why the scientists have been so successful. I think this is the most crucial question in philosophy of science, so I decided to work on it.

Q: You mention that you took classes from a philosopher who wrote a book titled Against Method. Do you think scientists are getting any help from philosophers today?

No, and that is a tragedy. Scientists are pursuing knowledge, so they need to understand the nature of knowledge and how it is acquired. But philosophers have become skeptics and therefore they have no help to offer. Consequently, most scientists dismiss philosophy as irrelevant to their work. I hope to convince them otherwise.

Q: Could you elaborate on your hopes for The Logical Leap? Who will read it, and what will they learn from it?

I hope that philosophers and their students learn that knowledge is possible, and that their field can offer the fundamental guidance that enables people to identify rational goals and achieve them. And I hope that scientists and their students gain insight into the principles of method that have led to the great discoveries of the past—and will lead to the great discoveries of the future.


Mr. Harriman has worked as a physicist for the U.S. Department of Defense and taught philosophy at California State University, San Bernardino. He is the editor of Journals of Ayn Rand. He has lectured on the scientific revolution, the concept of “space,” and the influence of Kantian philosophy on modern physics. He is currently writing two books: one demonstrating the influence of philosophy on modern physics (The Anti-Copernican Revolution), and another presenting Dr. Leonard Peikoff’s theory of induction (The Logical Leap). Mr Harriman’s Op-Eds have been published in numerous newspapers, including USA Today, the Philadelphia Inquirer, the Orange County Register, the Sacramento Bee and the Denver Post.

Mr. Harriman has founded the non-profit Falling Apple Science Institute to apply the ideas presented in The Logical Leap to K-12 science education.

4 Comments leave one →
  1. November 19, 2010 3:38

    thank you so much for this great informations !!

  2. November 19, 2010 3:38

    thank you for this topic !! good work


  1. Tweets that mention What Is Induction and Why Do Scientists Must Use It « THE VINCENTON POST --
  2. Some Influences Modern Philosophic

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: